Examples of cascading.operation.function.SetValue

cascading.operation.function.SetValue

Class SetValue is a utility {@link Function} that allows for a Tuple value to be returned based on the outcomeof a given {@link Filter} operation.

There are only two possible values, either {@link Filter#isRemove(cascading.flow.FlowProcess,cascading.operation.FilterCall)}returns {@code true} or {@code false}.

If {@code false} is returned, most commonly the {@link Filter} passed and the Tuple should be kept. SetValue will then returnthe first value in the given values array, by default {@code true}. If the Filter returns {@code true}, the second value in the values array will be returned, by default {@code false}.


    Pipe pipe = new Pipe( "setvalue" );


    pipe = new Each( pipe, new Fields( "line" ), new RegexSplitter( new Fields( "num", "char" ), "\\s" ) );


    pipe = new Each( pipe, new SetValue( new Fields( "result" ), new RegexFilter( "[A-C]" ) ) );


    Flow flow = getPlatform().getFlowConnector().connect( source, sink, pipe );


    flow.complete();

Examples of cascading.operation.function.SetValue

Related Classes of cascading.operation.function.SetValue